It's true.
But the thing is, they don't even know they're doing it. It's kind of how we are different people when we want to fuck them, vs after we fuck them and don't care to hold the door open anymore or anything like that. We think we are just being ourselves, but are really being the most fuckable version of ourselves. Well, that's not true. I know I'm totally full of shit when I try to fuck girls. But anyway, marriage is their end game whereas ours is sex. So they are biologically programmed to be a different person until they have you locked up, either with kids, or with some kind of social convention like marriage. But I can't help but feel my wife was intentionally deceptive.